Notes:
• The refrigerant pipe should be thickened when the single way length is over 90m.
• When in cooling mode, outdoor is lower than indoor; or when in heating mode, outdoor is higher than indoor, the
compensation factor should be decreased the below value from the above figure.
Vertical height drop
between indoor and
outdoor
Adjustment factor
(2) Calculation method of refrigerating capacity----heating capacity to be known=refrigerating
capacity*(A*B*C*D*E*F)W
A. Capacity compensation value of indoor
air dry-bulb temperature condition
1.2
1.1
1.0
0.9
0.8
15
20
Indoor air dry-bulb temperature (℃ )
C. Capacity modification value under airflow variation
rate of indoor unit group (only fro duct unit)
1.1
1.0
0.9
80
90
100
Airflow variation rate (%)
E. Capacity compensation value of pipe
length between outdoors
All the modules in the same
1.00
0.98
0.96
0.94
0.92
0.90
0
20
40 60
80 100 120 140 160 180
Single-way pipe length (m)
5m
10m
15m
0.003
0.006
0.009
24
110
120
20m
25m
30m
0.012
0.015
0.018
B. Capacity compensation value of outdoor air
wet-bulb temperature condition
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-15
-10
-5
Outdoor air wet-bulb temperature (℃ )
D. Capacity compensation suitable for
total capability of indoor unit group
120
100
80
60
40
20
0
20
40
60
80
Total capacity of indoor unit group (%)
F. Capacity compensation value for defrost
capability of outdoor heat exchanger
1.0
0.9
0.8
-15
-10
Outdoor air wet-bulb temperature (℃ )
16
16
35m
40m
45m
0.021
0.024
0.027
0
5
10
100 120 140
-5
0
5
50m
0.030
15
10